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Monotypic taxon:
Family †
Hemisyntrachelidae
Slijper, 1936
(mammal)
Taxa
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Hierarchy
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Entity:
Delphinoidea (Superfamily)
..[†Acrodelphinidae] (Family)
..†Albireonidae (Family)
..Delphinidae (Family) - oceanic dolphins
..[†Hesperoinia] (Genus)
..†Lophocetinae (Subfamily)
..Monodontidae (Family) - white whales
..†Odobenocetopsidae (Family)
..†Palaeophocaena (Genus)
..[Phocaenidae] (Family)
..Phocoenidae (Family) - porpoises
..†Pithanodelphininae (Subfamily)
..[†Prionodelphis] (Genus)
..†Protodelphinus (Genus)
..†Sinanodelphis (Genus)
..[Stenidae] (Family)
..[†Hemisyntrachelidae] (Family)
Authorship
Original name
:
Slijper, 1936:550.
Original rank
:
Original spelling
:
Types
Type
:
†
Hemisyntrachelus
(Genus)
Brandt, 1873
Synonyms
In
:
Delphinidae
(Family)
Gray, 1821
Ref:
F.G. Marx et al., 2016
: 140.
[inferred]
©2004-2026 Universal Taxonomic Services
Last updated:
28 Aug 2026